Human Endocrine Responses to Exercise‐Cold Stress

Castellani, John W.; DeGroot, David W.

doi:10.1002/9780470757826.ch33

Cited by 3 publications

(3 citation statements)

References 66 publications

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“…The adaptation of mechanisms under conditions of an increased heat loss in the immune system is evidenced by the study of Dugue et al [ 27 ], who noted that regular swimming in winter resulted in an increase in interleukins (IL-6) compared with untrained subjects. This is supported by the results obtained by the study of Castellani et al [ 28 ], who observed significant increases in ADH, cortisol, and interleukin-6, which are the most active cytokines involved in immune mechanisms. It is known that IL-6 affects the activity of B and T lymphocytes, bone marrow stem cells, erythroid, and granulocyte-macrophage series cells and stimulates thrombocytopoiesis [ 29 , 30 ].…”

Section: Discussionsupporting

confidence: 78%

The Effect of Extreme Cold on Complete Blood Count and Biochemical Indicators: A Case Study

Teległów

Romanovski²,

Skowron³

et al. 2021

IJERPH

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Regular exposure to a cold factor—cold water swimming or ice swimming and cold air—results in an increased tolerance to cold due to numerous adaptive mechanisms in humans. Due to the lack of scientific reports on the effects of extremely low outdoor temperatures on the functioning of the human circulatory system, the aim of this study was to evaluate complete blood count and biochemical blood indices in multiple Guinness world record holder Valerjan Romanovski, who was exposed to extremely cold environment from −5 °C to −37 °C for 50 days in Rovaniemi (a city in northern Finland). Valerjan Romanovski proved that humans can function in extremely cold temperatures. Blood from the subject was collected before and after the expedition. The subject was found to have abnormalities for the following blood indices: testosterone increases by 60.14%, RBC decreases by 4.01%, HGB decreases by 3.47%, WBC decreases by 21.53%, neutrocytes decrease by 17.31%, PDW increases by 5.31%, AspAT increases by 52.81%, AlAT increase by 68.75%, CK increases by 8.61%, total cholesterol decreases by 5.88%, HDL increases by 28.18%. Percentage changes in other complete blood count and biochemical indices were within standard limits. Long-term exposure of the subject (50 days) to extreme cold stress had no noticeable negative effect on daily functioning.

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Section: Discussionsupporting

confidence: 78%

The Effect of Extreme Cold on Complete Blood Count and Biochemical Indicators: A Case Study

Teległów

Romanovski²,

Skowron³

et al. 2021

IJERPH

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“…Plasma norepinephrine is used as an acute marker of sympathetic nervous system activity as norepinephrine is released from peripheral sympathetic nerve endings during stress. 16 Not surprisingly, norepinephrine increased significantly in the current study, indicating activation of the SAM axis during an ultraendurance race in the cold. This finding is similar to the results of Dulac et al, 8 who reported increased norepinephrine levels after a 9-hour cold-water swim.…”

Section: Discussionsupporting

confidence: 51%

“…During resting cold exposure, increases in norepinephrine, epinephrine, ACTH, and cortisol result in heat production, fuel mobilization, and decreased heat loss. 15,16 During exercise in the cold, norepinephrine and epinephrine have been reported to increase [17][18][19][20][21] or not change. 18,22,23 Adrenocorticotropic hormone has been found to not change, 24 and cortisol may increase, 24 -26 decrease, 27 or not change.…”

Section: Introductionmentioning

confidence: 99%

Stress Hormone Responses to an Ultraendurance Race in the Cold

Stuempfle

Nindl

Kamimori

2010

Wilderness & Environmental Medicine

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The influence of winter swimming on the rheological properties of blood

Teległów¹,

Dabrowski²,

Marchewka³

et al. 2014

Clinical Hemorheology and Microcirculation

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The aim of this study was to analyze the changes in blood rheology resulting from regular winter swimming. The study was carried out on 12 male winter swimmers. Venous blood for morphological, biochemical and rheological analysis was sampled twice from each winter swimmer -at the beginning of the season and after its completion. There were no significant changes detected in the median values of most blood morphological parameters. The only exception pertained to MCHC which was significantly lower after the season. Winter swimming entailed significant decrease in median elongation index values at shear stress levels of 0.30 Pa and 0.58 Pa, and significant increase in median values of this parameter at shear stress levels ≥1.13 Pa. No significant changes were observed in winter swimmers' median values of aggregation indices and plasma viscosity. The median level of glucose was lower post winter swimming in comparison to the pre-seasonal values. In contrast, one season of winter swimming did not influence swimmers' median value of fibrinogen concentration. In summary, this study revealed positive effects of winter swimming on the rheological properties of blood, manifested by an increase in erythrocyte deformability without accompanying changes in erythrocyte aggregation.

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Human Endocrine Responses to Exercise‐Cold Stress

Cited by 3 publications

References 66 publications

The Effect of Extreme Cold on Complete Blood Count and Biochemical Indicators: A Case Study

The Effect of Extreme Cold on Complete Blood Count and Biochemical Indicators: A Case Study

Stress Hormone Responses to an Ultraendurance Race in the Cold

The influence of winter swimming on the rheological properties of blood

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